<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>hello</title>
</head>
<body>
{#{%  for a in 3 %}#}
{#{% block='liu' %}#}
{#{% endblock %}#}
{% cycle '#red' '#blue' %}
<h1>hello {{ name }} ! Age: {{ age|add:2 }}</h1>
</body>
</html>